There can be only one instance of NinjaTrader at a time...

[BrianNC]

Did some searching and I see where having enabled connect on startup could be my problem. The only problem is I can't start it up to change that option without getting the error. I uninstalled NT thinking a clean install would work, but I still get the same error.

[NinjaTrader_Kyle]

Hello BrianNC,

Thank you for your post.

Please contact me by email at Support AT NinjaTrader DOT com. In the message please include a link to this forum thread and a copy of your Config file.

The Config file can be found in the Documents > NinjaTrader 7 folder.